             ;; logs parameter.
             ;; The bigger-picture problem is that the problem wasn't
             ;; immediately obvious
-            child-cb (fn [#_logs array-o-bytes]
+            ;; FIXME: Start back with the caller to fix that.
+            child-cb (fn [logs array-o-bytes]
                        (println "Top of child-cb")
                        ;; TODO: Add another similar test that throws an
                        ;; exception here, for the sake of hardening the

                                       ;; It only makes sense in this test because
                                       ;; I'm totally mocking out any sort of real
                                       ;; interaction.
                                       (.close to-child)
                                       (deliver response buf)
                                       logs)
                                     logs)]

                                                                                  ::echo-child-cb
                                                                                  "Sent EOF after the message block")]
                                                        (log2/flush-logs! logger inner-logs))))
                                                  logs))]
                                     (log2/warn logs :echo-child-cb "Empty incoming message. Highly suspicious"))
                                   (let [{:keys [::specs/from-child]
                                            :as io-handle} @io-handle-atom
                                           logs (log2/warn logs
                                                           ::echo-child-cb
                                                           "Child received what should be EOF. Mark done.")]
                                       (message/child-close! io-handle)
                                       (is (s/valid? ::specs/eof-flag array-o-bytes))
                                       (deliver child-finished array-o-bytes)
                                       logs))]
                             (log2/flush-logs! logger logs))
                           (catch Exception ex
                             (println "child-cb Failed:" ex)
